Page 172 - Optical Switching And Networking Handbook

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Optical Networking and Switching Vendors 157

Table 7-2 ADC Telecommunications
Alcatel
Major
SONET/SDH Artel Video Systems, Inc.
Manufacturers Bosch Telecom, Inc.
Cambrian
Ciena Corporation
Ericsson
Fujitsu
Hitachi Telecom
Lucent Technologies, Inc.
NEC America, Inc.
Nortel Networks
Osicom Technologies Inc.
Pirelli Cable Corporation
Scientific Atlanta
Siemens Telecom Networks
Tellabs, Inc.
Tellium

Many component firms exist, including these shown in Table 7-3.
SONET and SDH ring networks will continue to be the backbone
for high-speed networks using OC-48 and OC-192 add-drop multi-
plexers at network nodes. However, increased use of WDM technol-
ogy will enable network capacity to grow exponentially. WDM also
may be integrated into OC-12, OC-48, and OC-192 networks, so long
as vendors provide standard wavelengths in the 1550-nm window. In
some cases, WDM cannot be placed over the SONET layer. Instead,
transponders that are more expensive are used. In general, though,
WDM will be the most cost-effective option that provides the neces-
sary bandwidth without installation of additional fiber. The market
has been hot, as discussed in previous chapters, with industry pre-
dictions continuing to spiral upward, as shown in Figure 7-1. The
market was approximately $4.4 billion in 1998 and is expected to